Subject: [mg28633] Re: I want to rotate a series points around a spatial line

From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>

Date: Thu, 3 May 2001 04:28:24 -0400 (EDT)

Organization: Universitaet Leipzig

References: <9cfsa4$gqb@smc.vnet.net>

Sender: owner-wri-mathgroup at wolfram.com

Hi,
look into the source code of Graphics`SurfaceOfRevolution`
there is a function that make the rotation matrix from
the axes, angle notation of a rotation. When you have the
rotation matrix you can rotate your points.
Regards
Jens
liwen liwen wrote:
>
> Dear friends;
>
> How are you!
> I want to rotate a series points around a line, for
> example,ptset={{0,0},{5,5},{2,5},{7,9}};
> the line goes through {1,1,1} and {4,5,7}, I want to
> rotate the ptset around the line for t angle,
> what should I do?
>
> Thank you very much!
>
> Liwen
> e-mail: gzgear at yahoo.com
>
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